Examples

So now, with his will or without it, his feet bore him on, and he followed up the stream which the Lady had said ran into the broad river called the Swelling Flood; "for," thought he, "when I come thereabout I shall presently find some castle or good town, and it is like that either I shall have some tidings of the folk thereof, or else they will compel me to do something, and that will irk me less than doing deeds of mine own will."

"Swelling" is usually caused by fluid leaking out of anatomically intact capillaries because of various physiological derangement low protein levels, high return pressures, etc. for which exercise and stuff makes sense.

Swelling is dangerous, he said, because it can destroy the brain stem — which controls respiration, the heart beat and wakefulness — by driving it down through the opening in the skull where the brain links to the spine.